J.H.
I have suffered w/IBS -D for over 15 years so I can relate to you. If you have not yet done so, please check out helpforibs.com...this website gives you so much info on how to eat for IBS, what to eat and what not to eat as well as a multitude of recipes. It has def. been a lifesaver for me and countless others. I would suggest eating soluble fiber "safe" foods for a few days before your trip...rice, french bread, bananas, "no yolk" noodles,applesauce...etc. Stay away from coffee, soda, and sugary drinks. Drink plenty of fresh water, mint tea...feel free to msg me if you have any other questions!